Custom Size High Efficiency HEPA Filter 99.995% H13-U17 With Jelly Glue Seal YAYE Custom Size High Efficiency HEPA Filter 99.995% H13-U17 With Jelly Glue Seal Suitable For Clean Rooms. Aluminum Alloy Frame. Product Description Frame material: The frame is made of lightweight, corrosion-resistant and easy-to-process aluminum profiles. High filtration efficiency: It can be classified into types such as HEPA filters and ULPA filters, with filtration efficiencies reaching 99.97%